Section 35(1)(ii) in The Delhi Metro Airport Express Line, General Rules, 2010
(ii)signalling link enables automatic operation of the Platform Screen Doors only when the train stops within ±500mm of it's normal stopping position, in the rare event of a train stopping outside this limit, the train may be driven under operator's control in Cut out mode, if necessary, to reposition it, and allow normal operation of the Platform Screen Doors when correctly positioned in accordance with sub-rules (9), (10) and (11) of rule 31.